Will measures the diameter of a penny as 1.9 cm using the ruler what is the margin of error

Diameter of Penny measured by Will using the ruler=1.9 cm

The exact measurement of Penny's Diameter can't be 1.9 cm, it can be in between [1.85 cm , 1.90 cm) or (1.90 cm,1.95 cm].

→Margin of error will be

        Between, 0 cm to 0.05 cm.

That is→ (0,0.05).

+25 = x

step-by-step explanation:

here x is the hypotenuse of a right triangle whose legs are 7 and 24.   by the pythagorean theorem, 7² + 24² must equal x²:

x² = 49 + 576 = 625.   thus, x = +√625 = +25 = x

it’s the first one your welcome